While Mia is 18th-in-line to the throne, she does not hold a formal title. This is because her mother Zara’s parents, Mark Phillips and Princess Anne, declined to give their own daughter a title, meaning no formal royal ranking passes down to Mia.

Zara has previously admitted she feels "lucky" that her parents made this decision.

“I’m very lucky that both my parents decided to not use the title and we grew up and did all the things that gave us the opportunity to do,” she previously stated.

Zara has a second daughter, Lena Elizabeth, born in June 2018.

Joining Mia in the bridal party will be Theodora Rose Williams, Princess Charlotte, Savannah and Isla Philips, and Eugenie's goddaughter Maud Windsor (daughter of actress Sophie Winkleman and Lord Freddie Windsor). Louis de Givenchy (the son of Olivier de Givenchy) and Prince George will be page boys.